Treatment of chlorinated organic contaminants with nanoscale bimetallic particles

Nanoscale bimetallic particles (Pd/Fe, Pd/Zn, Pt/Fe, Ni/Fe) have been synthesized in the laboratory for treatment of chlorinated organic pollutants. Specific surface areas of the nanoscale particles are tens of times larger than those of commercially available microscale metal particles. Rapid and c...

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Bibliographic Details
Published in:Catalysis today 1998-05, Vol.40 (4), p.387-395
Main Authors: Zhang, Wei-xian, Wang, Chuan-Bao, Lien, Hsing-Lung
Format: Article
Language:English
Subjects:
Chlorinated organic contaminants
Dechlorination
Iron
Nanoscale bimetallic particles
Palladium
Tetrachloroethene
Trichloroethene
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Summary:Nanoscale bimetallic particles (Pd/Fe, Pd/Zn, Pt/Fe, Ni/Fe) have been synthesized in the laboratory for treatment of chlorinated organic pollutants. Specific surface areas of the nanoscale particles are tens of times larger than those of commercially available microscale metal particles. Rapid and complete dechlorination of several chlorinated organic solvents and chlorinated aromatic compounds was achieved by using the nanoscale bimetallic particles. Evidence observed suggests that within the bimetallic complex, one metal (Fe, Zn) serves primarily as electron donor while the other as catalyst (Pd, Pt). Surface-area-normalized reactivity constants are about 100 times higher than those of microscale iron particles. Production of chlorinated byproducts, frequently reported in studies with iron particles, is notably reduced due to the presence of catalyst. The nano-particle technology offers great opportunities for both fundamental research and technological applications in environmental engineering and science.
ISSN:0920-5861
1873-4308
DOI:10.1016/S0920-5861(98)00067-4